Manifest synthesis + miniboxing dupl => error

[VladUreche]

$ cat gh-bug-H.scala 
package miniboxing.tests.compile.bugH

abstract class Color[@miniboxed Repr: Manifest]
case class ColorEntry[@miniboxed T](r: T, g: T, b: T, a: T)
abstract class FourColor[@miniboxed T: Manifest] extends Color[ColorEntry[T]]

$ ../mb-scalac gh-bug-H.scala

gh-bug-H.scala:5: error: [ occured while creating miniboxed constructor FourColor_D in class FourColor_D ]
type mismatch;
 found   : Class[miniboxing.tests.compile.bugH.ColorEntry[T]](classOf[miniboxing.tests.compile.bugH.ColorEntry])
 required: Class[miniboxing.tests.compile.bugH.ColorEntry[Tsp]]
abstract class FourColor[@miniboxed T: Manifest] extends Color[ColorEntry[T]]
                                                         ^
one error found